Centrifugal pump



Sept. 4, 1934. F. E. BRADY, JR 1,972,548

CENTRIFUGAL PUMP Filed Aug. 11, 1932 2 Sheets-Sheet 1 INVENTOR FRA was 5. BR/JDXJF ATTORNEYS Sept. 4", 1934. F. E. BRADY, JR 1,972,548

CENTRIFUGAL PUMP Filed Aug. 11, 1932 2 Sheets-Sheet 2 IIIIIIIIIIIIII mum Q) mm /2 2 23 mAlvc/fs f q oxJ munnnu /9 v MM \l ATTORNEYS Q iatented Sepi 4,

' UNI TED STATES J 1,972,548 QENTBIFUGAL PM Francis E. Brady, Jr., Richmond, Ind assignor,

by mesne assignments; to Richmond Pump 00. -Inc., Richmond, Ind.

Application August '11, 1932, Serial no. mm

Turbine 17 Claims. (01. 103-96) My invention relates to hydraulic pumping apparatus.

The pump of my invention is a. regenerative pump in which the runner bucket impinges againstthe free fluid in the channel of the pump and carries the fluid therein with iii a plurality of such buckets engaging the fluid in the channel.

My pump does not depend upon centrifugal effect upon the water, it does not utilize centrifugal force as' its prime motive power, and it does not depend upon the velocity of the water I as built up by the impeller and upon means for changing this velocity into pressure.

It is my object to eliminate the movement of the fluid between impeller vanes.

It is the object of my invention to place my vanes on the peripheral side of the impeller and pocket them sonthat any centrifugal force will actually work against the impeller.

It is my object to provide an impeller in which the vanes are inclined in the direction of movement of the flu'id so that centrifugal movement of the fluid upwardly will be against the overhanging sides of the vanes, thereby materially increasing the head of the pump. g

It is my object to so form the rear side of the runner vanes in a true relief curve-that I decrease the torque without losing an increase in working efiiciency of the pump.

It is my object to provide a pump which is capable of pumping against higher pressure for a given peripheral speed than is possible with centrifugal impeller pumps.

It is 'my object to provide .a circumferential taper of approximately 15 degrees to hold arunning clearance in this type of pump;

It is my object to provide a runner vane inwhich the depth of the vane should be equal to the depth of the channel carrying the stream of fluid and the, vane shall face the fluid in'the direction of rotation atflan angle of about 45 degrees to the tangent of its point of contactwith the periphery.

It is desirable that the space between the vanes shall be 1 /2 times their depth along. the vane, face and that the rear side of the vane shall shoulder 25a. The teeth in this connection of plate partially Figure 2 is a section on the line 2-2 of Figure 1 Figure 3 is a top plan view of the impeller; Figure 4 is a similar view to Figure 1- with a modified form of impeller vane;

Figure 5 is a section on the line 55 of Figure 4; Figure 6 is a section on the line 6-6 of Figure 4; Figure 7 is a top plan view of a portion of the modified form of impeller vanes.

Referring to the drawings in detail, 1 indicates a conventional base fora pump casing, which has an inlet passageway 2 communicating with a rotor chamber port 3. This chamber has an out- 'let port 4 communicating with a discharge passageway 5. A rotor chamber 6 is formed by one side of the casing 7 and a-detachable cover plate 8 held in position by the bolts 9. The wall 7 is provided with a bearing sleeve 10 having a bearing 11 for supporting the rotor shaft 12. Between a the rotor 13 and the interior of the bearing 11 is a packing gland 14 held in position by the spring 15. The other end of the shaft 12 has threaded thereon a bearing member 15a which rides against a. ball 16 that in turn rests upon the screw mem-.

her 17 carried in the sleeve 18 and the detachable vided with a tapered flange 21 having a tapered surface 22 in which is cut a fluid channel 23. Cooperating with this taper is a tapered surface 24 of the impeller in which is a peripheral channel 25 divided transversely by a plurality of overhanging teeth 26 preferably formed and arranged as heretofore described.

Turning to the form shown in Figures 4, 5, 6 and '7, it will be noted that the impeller, instead of having a water channel between oppositely-disposed shoulders 25a and 25b, has only the single the impeller formthe vanes.

It will be understood that I desire to comprehend within my invention such modifications as may .be necessary to adapt it to varying conditions and uses.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is: 1

1. In a pump, a pump casing having a tangential inlet passageway and a radial outlet pasageway, a closure plate for the casing having a flange forming an annular water passageway extending substantially around the inside of the casing and communicating with the inlet passagewayand the outlet passageway, and a rotary impeller mounted within said flange and forming a said flange surrounding the impeller and located between it and the inner annular wall of the easing, said impeller having a plurality of spaced teeth inclined in the direction of rotation of the impeller from the inlet to the outlet passageway.

2. In a pump, a pump casing having a tangential inlet passageway and a radial outlet passageway, a closure plate for the casing having a flange forming an annular water passageway extending substantially around the inside of the casing andcommunicating with the inlet passageway and the outlet passageway, and a rotary impeller mounted within said flange and forming a portionof the wall of said annular passageway, said flange surrounding the impeller and located between it and the inner annular wall of the casing, said impeller having a plurality of spaced teeth inclined in the direction of rotation of the impeller from the inlet to the outlet passageway, said teeth having on one side at least a wall substantially around the inside of the casing and communicating with the inlet passageway and the outlet passageway, and a rotary impeller mounted within said flange and forming a portion of the wall of said annular passageway; said flange surrounding the impeller and located be-.- tween it and the inner-annular wall of the casing, said impeller having a plurality of spaced teeth inclined in the direction of rotation of the impeller from the inlet to the outlet passageway, said teeth having opposite side walls to form a channel therebetween in which the teeth are located and across which they extend.

4. In a pump, a pump casing having a tangential inlet passageway and 'a radial outlet passageway, a closure plate for the casing having a flange forming an annular water passageway extending substantially around the inside of the casing and communicatingwith the inlet passageway and the outlet passageway, and a rotary impeller mounted within said flange and forming a portion of the water passageway.

- 5. In a pump, a casing having in one side a rotor chamber with an inlet'and outlet port, a

relatively shallowrotary impeller disk in said chamber having a plurality of peripherallyarranged teeth annularly disposed and inclined in the direction of rotation of the impeller and a cover plate for said chamber having an annular flange extending therein and locatedbetween the outer periphery of the impeller and-Jan inner annular wall of said chamber.

6. In a pump, a casing having in one side a rotor chamber within inlet and outlet port, a relatively shallow rotary impeller disk in said chamber chamber having a plurality of peripherally-arranged teeth annularly disposed and inclined in the direction of rotation of the impeller, a cover plate for said chamber having a flange surroundportion of the 'wall of said annular passageway, ing the impeller disk, and an annular wall on the side of said teeth cooperating with said flange to faces inclined at an angle on an axis about which n the impeller rotates, and a closure plate for the casing having a flange around the impeller disk, said flange having therein adjacent the disk a fluid channel connected to theinlet port and the.

outlet port.

8. In a pump, a pump casing ha g an inlet and exit passageway communicating with an annular chamber in said casing,fa tapered flange I detachably mounted in said casing and carried by a cover plate mounted on said casing, and

forming therewith said chamber, and an impeller traveling within said sleeve, said impeller having a plurality ,of teeth inclinedinthe direction of rotation thereof. e

9. In a pump comprising means for forming .an inlet passageway and an outlet passageway and an annular impeller chamber having an open open face 'of the pump casing and form with the periphery of the impeller an annular water chamber in communication with said inlet and outlet passageways, said impeller having a plurality of teeth inclined'in the direction of rotation thereof extending into and partially across said annularwater chamber, said impeller having a tapered'external'face and said portion of the cover having a cooperating tapered face whereby a seal is formed between the impeller and said casing to prevent leakage from said annular space for fluid, and yielding means between said impeller and the casing forcing the impeller against the cover.

10. In a pump, a casing having a horizontallydisposed bearing sleeve for an impeller shaft and a cup-shaped depression in the face thereof communicating with outlet and inlet passageways, a cover plate for said annular depression having a sleeve and a laterally-extending tapered flange around the sleeve adapted to form with an impeller an annular fluid passageway, an impeller having a cooperating peripherally-tapered face with inclined teeth on the periphery thereof extending into said annular passageway, an impeller shaft extending into and supported by the sleeve in said cover and the sleeve on the casing.

11. In a pump, a casing having a horizontallydisposed bearing sleeve for an impeller shaft and a cup-shaped depression in the face thereof communicating with outlet and inlet passageways, a cover plate for said annular depression having a sleeve and a laterally-extending tapered flange around the sleeve adapted to form with-an impeller and annularfluid passageway, an impeller having a cooperating peripherally-tapered face pump with inclined teeth on the periphery thereof extending into said annular passageway, an impeller shaft extending into and supported by the sleeve in said cover and the sleeve on the pump casing, yielding means for forcing said impeller peripherally against said cover, and an adjustable thrust means associated with said cover for receiving the thrust on the impeller and the shaft.

12. In a pump, a casing having a circular chamber with a cone-shaped periphery, a rotor in the chamber having a cone-shaped periphery engaging the periphery of the chamber, said casing having a passageway substantially around the periphery of the rotor, and means to adjust the rotor in the chamber, said means including a screw and a spring acting against the screw.

13. In a pump, a casing forming a circular chamber andhaving bearing sleeves, a rotor in said chamber, a shaft for said rotor in said sleeves, means in one sleeve to adjust the shaft and the rotor, and means in the other sleeve acting on the rotor against the adjusting means.

14. In a pump, a casing having a tangential inlet passageway, a radial discharge passageway and an annular channel connecting said passage- -ways, the surface of the casing in which the and an annular channel connecting said passageways, the surface of the casing in which the channel is located being conical, an impeller in the casing having a conical surface on its periphery engaging the conical surface of the casing, teeth in the periphery of the impeller, yielding means tending to hold said conical surfaces in engagement with each other,and means at each end of each of the teeth to form a sealing connection between the impeller and the casing on each side of the channel.

16. In a pump, a plate having an annular flange with a tapered inner surface, said inner surface having a fluid channel extending partly around the inside of the flange and terminating in an inlet and in an outlet through the flange, a rotor having a tapered periphery, said rotor entirely surrounded by said flange, and adapted to engage the tapered inner surface of the flange, and teeth formed in the periphery of the rotor adjacent the channel.

17. In a pump, a plate having an annular flange with a tapered inner surface, said inner surface having a fluid channel extending partly around the inside of the flange and terminating in .an inlet and in an outlet through the flange, a rotor having aktapered periphery, said rotor entirely surrounded by said flange, and adapted to engage the tapered inner surface of the flange, teeth formed in the periphery of the rotor adjacent the channel, and a casing to supoprt the plate and force the rotor against the flange.

FRANCIS E. BRADY, JR. 

